*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.draggable{
    display: inline-block;
    height: 40px;
    line-height: 40px;
    flex: 90;
}
li{
    display: flex;
}
#root{
    width: 200px;
    border: 1px solid pink;
}

#root>li:not(:last-of-type){
    border-bottom: 1px solid pink;
}
.number{
    background-color: gray;
    flex: 10;
}
.drag-white{
    background-color: white;
}
.over {
    background-color: pink;
    
}
